Sturdy base flexible container with rectangular flat base



FIG. 1 is a front view of a sturdy base flexible container with rectangular flat base showing our new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a first side view thereof;

FIG. 4 is a second side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a forward upper perspective view thereof; and,

FIG. 8 is a forward lower perspective view thereof. 

CLAIM The ornamental design for a sturdy base flexible container with rectangular flat base, as shown and described. 